Phosphorescent sign.



' B. G. KODJBANOFF.

PHOSPHORESGENT SIGN.

APPLICATION FILED JUNE 29, 1907.

899,873, Patented Sept. 29, 1908.

B I v BASIL G. KODJBANOFF, OF NEW' YORK, N.Y.

I To all whom it may concem."

, Be it known that I, BASI G. KooJBANoFF, of New York city,

invented acertain new and useful Improvement in Phosphorescent Signs, and dohereby declare that the followingis a full, clear,

and exact description thereof, reference be-- ing had to the accompanying drawing, in which--' Figure l is a plan-iiew oft-he sign embodying my invention and Fig. 2 is a sectionof Fig.1.

The object of my invention has been to provide a phosphorescent sign of great durability, and ofattractive appearance, and to such ends my invention consists in the phosphorescent hereinafter specified.

In making a'sign according to my invention, sunken'letters are formed preferably ina'n enameled surface: the drawing illustrates one manner in which such sunken letters may be formed. In the drawing there sunken letters 1 3 0 is a plate'of metal A having surface the letters of the then coated impressed in its sign. The plate is with a coating .of enamel B,

which is preferably. a porcelain enamel. The enamel while covering the metal, still forms corresponding to those in the metal. The sunken letters are then partly or wholly filled with a phosphorescent preps aration C. The preparation which I prefer to use is commercial phosphorus, rendered more plastic by the addition of a small percentage of barium. Any desired pigment may also be added to the mixture. The phosphorus mixture is preferably applied in a cold condition." I*inally,-a coating D of glass is spread over the entire face of the sign in apla'stic condition covering both the enamel and the phosphorus mixture. I prefor .to heatonly the glass and to" heat that only to atemperature suflicient. to enable it to' adhere to'the porcelain. The coating of glass is preferably very thin. It does not .inure the phosphorus but, on the other hand, Protects 1t.- I

I believe Ifam the first to ever .devise an Specification of Letters Patent. Application filed J'uiie29, 1907. Serial No. 881,560.

in the county of New" ,York, and'in the State of New York, have- .formed therein, a coating 0 rnosrno mscnn'r- SIGN.

latented Sept. 29, 1908.

enameled phosphorus sign, and I wish to cla m such invention broadly. I also believe I am the first to ever cover a phosphorus close a phosphorus mixture between a backing of enamel and a facing of glass whereby itis fully protected from the atmosphere. I therefore desire that my claims shall have the broadest interpretation consistent with their terms and the prior art. Signs made according to my invention will be legible both for day and night, and in that respect will be particularly desirable afor such uses as license numbers 011 automobiles.

Iclaim:. w' 1. A phosphorescent sign, comprisingletters formed of phosphorescent COIIIPOSlilOll,

vand a glass inclosure for such letters, said glass being welded to seal such compositioi'i therein. Y

2. A hos )horescent s1 n consistiiw of p i phosphorescent characters, a glass inclosure for said characters and a back, said glass iiiclosures being sealed to hermetically inclosc said characters, and being secured to said back.

3. A phosphorescent sign, comprising a base, a coating of enamel on said base, a coating of glass covering the said enamel and welded thereto, said glass and enamel being separated at points removed from their edges 'to form character-shaped spaces,

and characters formed of phosphorescent composition inclosed in said spaces.

4. A phosphorescent sign, comprising a base having character-shafped depressions base, characters of phosphorescent composition occu yin'g said depressions, and a coating of-g ass covering said characters and welded to said enamel.

In testimony that I claim the foregoing I have hereuntosetiny hand.

. BA SIL G. KODJBANOFF. Witnesses:

'EDWIN J. PRINDLE, ISABEL PEARsE.

sign with glass applied in a plastic condii101], I also believe I am the first to ever inenamel on said 

